Lock nut



G. W. LESTER.

LOCK NUT.

APPLICATION FILED JULY I4. 1920.

Patented Feb. 7

' one or more radial grooves 12 disposed in GEORGE w. LESTER, or'nmvrnw, momma LOCK NUT.

Specification of Letters Patent. Patented Feb, 7, 1922,

Application fi1ed Iu1y 14,,1920. Serial No 396,056.

To all whom it may'concem:

Be it known that I, GEORGE W. LESTER, a citizen of the 1 United States of America, residing at Daleview, in thecounty of S heridan and S'tate of Montana, have invented new and useful Improvements in Locklluts, or which the following is a specification.

The objectof the lIl'VBIltlOIl'lS to provide a simple and relatively inexpensive lock nut having means readily applicable to a nut of the ordinary construction whereby the same may be secured in adjusted positions upon the bolt engaged thereby to'prevent displacement or disarrangement by arring or vibration, and with. this object in view,

the invention consists in a construction and combination of arts, of which a preferred embodiment is s own in the accompanying drawings, wherein I a Figure 1, is a face View of-a nut equipped with the locking means constructed in accordance with the invention.v

Figure 2, is a sectional view of the same.

Figure 3, is'a transverse sectional View on the plane indicated by'the line 3--3 of Figure 2.

Figure4, is a detail. view in perspective of one of the locking dogs. 1

The locking means maybe applied to a nutlO of any preferred construction by providing in the bolt opening, oreye 11 thereof intersecting. relation with the threads 13 and extending continuously'from one side face of the nut to the other as shown clearly in Figure 3. In each of these thread intersect-. ing grooves there is arranged a dog 14 consisting of a bar as indicated in detail in Figure 4'," having teeth 15 corresponding and registering with the threads of the nut and adapted to engage with the threadsof the 7 bolt upon which the nut is fitted, said dog having terminal pliable ears 16 which are reversely extended into engagement with sockets 17 formed in the side surfaces of the nut serving to pivotally connect the dog to the nut.

The grooves 12 are ofa width exceeding the nut is threaded on the bolt, the dog assumes an inclined position in the groove so.

that the bevelled edges of the teeth 15 contract or slide freely over the surfaces of the threads of the bolt, but obviously when a reverse movement of the nut in relation to the bolt is attempted, the teeth bite into the bolt threads and thus effectively look the nut against reverse rotation.

The invention having been described, what is claimed asnew and useful is:

' A look nut having its bolt opening prothe width of the dogs to the end that as vided with a groove disposed in intersecting relation with the threads of the opening, and a dog arranged in said groove and of less width than the latter, the dog being provided with teeth of a. pitch corresponding to the pitch of the threads in the bolt opening and having terminal pliable ears at each end which are reversely extended and pivotally-en'gaged in sockets formed in the sidesurfaces of the nut to one side of the transverse center of the groove.

In testimony whereof I aflix my signature.

GEORGE W. LESTER. 

